Improvement in rotary cutters for trimming boot and shoe soles and heels



J. H. BUSELL. Rotary Gutter for Trimming Boot and Shoe Soles.

and Heels.

No. 210,000. Patented Nov.19,1878

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UNITED STATES PATENT Or'r'ron.

JAMES EBUsnLn, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN ROTARY CUTTERS FOR TRIMMING BOOT AND SHOE SOLES ANDHEELS.

Specification forming part of Letters Patent No. 210,006, dated November19, 1878 application filed February 26, 1878.

To all whom it may concern:

Be it known that I, JAMES H. BUSELL, of Boston, in the county of Suffolkand State of Massachusetts, have invented a new and useful Improvementin Rotary Cutters for Trimming Sole-Edges, and forother purposes, ofwhich the following, taken in connection with the accompanying drawings,is a specification.

My invention relates tothe construction of rotary cutters for trimmingthe edges of boot and shoe soles and heels, and for other light work;and has for its object the production of a cutting-tool for suchpurposes, that may be easily sharpened or kept in working condition, anyblade of which may be readily removed and replaced by another in case ofbreakage, and to facilitate the proper and perfect tempering orhardening of such cutting-blades.

It consists in constructing said cutters with a central cylindrical hub,and a series of chisel-pointed cutting-blades set in the periphery ofsaid hub and secured in place by means of dovetailed grooves extendinglongitudinally of said hub, either parallel with or inclined to the axisof the hub, and an increased thickness of stock upon the inner edge ofsaid cutting-blades shaped to fit and tightly fill said dovetailedgrooves, as will be described.

It has been found that when such cutters were made from one piece ofmetal, as generally practiced, the cutting-blades had to be made veryshort, or great difficulty would occur in tempering or hardening thesame, and as a consequence the amount of wear that could be obtainedfrom a cutter was quite limited; and when the short blades were worndown the whole cutter had to be discarded and a new one made to fill itsplace.

These difficulties are entirely overcome by the employment of myimproved cutter, inasmuch as the cutting-blades, being made separatefrom the hub, and of nearly uniform thickness throughout, may be readilyhardened uniformly throughout without danger of breaking or crackingthem; and being made to a gage, so that they are of uniform shape andsize, it follows that said blades are interchangeable, and, therefore,if one blade becomes broken it may be easily removed and another put inits place, or when the whole set of blades become so worn as to beunserviceable a new set may be put in their places without the troubleand delay of sending the cutter to the machine-shop.

Figure 1 of the drawings is an end view of a cutter-head of a formadapted to use on the machine patented by me September 21,

1875, and having my present invcntionapplied thereto. Fig. 2 is an edgeview of the same complete. Figs. 3 and 4 are, respectively, a sideelevation and an end View of one of the cutter-blades. Fig. 5 is an endview of the cutter-head or central hub with the cutting-blades removed.Fig. 6 is" an edge view of the same; and Fig. 7 is a similar edge viewillustrating a modification of said hub, with the grooves to receive theblades cut oblique to its axis for the purpose of setting the bladesspirally, or so as to produce a drawing out.

A is the cutter-head or hub, fitted with a female screw-thread, by whichit may be secured upon. the end of the cutter-shaft of a sole or heeltrimming machine, and having formed in its periphery a series ofdovetailshaped grooves, a a, extending longitudinally thereof parallelwith its axis, as shown in Fig. 6, or oblique thereto, as shown in Fig.7.

B B are the cutting-blades, made from a thin plate of steel, cut to theproper form, with their cutting-edges beveled to form a chisel-shapededge, I), the inner edges, 0, of sald cutter-blades being slightlythickened and dovetail-shaped, so as to fit closely in the grooves a a,as shown in Fig. l, the two sides of that portion of said blades whichproject beyond the periphery of the hub A being parallel, or nearly so,with each other, as shown in Figs. 1 and 4.

These blades may be set in the hub so as to stand out radiallytherefrom, but I prefer to set them inclined to a radial line, as shownin Fig. l, for the reason that the edge of the blade or knife ispresented to the work at a better angle to out than if the front side ofthe blade were radial to the axis of revolution.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is-

A cutting-tool composed of a central cylindrical hub and a series ofdetachable cutting- Executed at Boston, Massachusetts, this 23d bladesprovided with a, chisel-shaped cuttingday of February, 1878. edge, andsecured to said hub with their front JAMES H BUSELL sides inclined toradial lines by means of a dovetailed joint extending longitudinally ofWitnesses:

said hub, substantially as and for the purposes N. O. LOMBARD,described. E. A. HEmrENWAY.

